娠前5个月胎儿身长（cm）计算公式为
A. 月数X5
B. 月数X4
C. 月数X3
D. 月数X2
E. 月数的平方
肩先露时，胎心音听的最清楚的部位是
A. 脐部上方
B. 脐部下方
C. 脐部左侧
D. 脐部右侧
E. 左下腹部
26岁孕妇，孕38周行产前检查，宫底剑突下三横指，头先露，胎背在母体右前方，胎心音在母体右侧脐下方听得最响，胎方位诊断应是
A. LOA
B. ROA
C. LOP
D. ROP
E. RSA
Which of the following events happened in 2018 inChina?
A. the successful launch of Chang’e-4 lunar probe
B. the maiden voyage of the second aircraft carrier set
C. the first water launch of our domestically-made large amphibious aircraft
D. all of the above
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